ABSTRACT
This chapter gives an introduction to the principles on which roaming and network interoperability will be built in IMT2000 networks for multimedia and mobile TV services.
Interoperability is a multidimensional issue. At the turn of the century, in the Year 2000, most of the world was basking in the glow of mobile interoperability. The GSM mobile networks, which had spread by now to all continents, including the Far East, Asia, South America, and Africa, in addition to the whole of the United States and Europe, now provided seamless roaming. Apart from the networks, which were interoperable, the commercial arrangements had also fallen into place and testing completed to enable customers to roam seamlessly. This was so at least in the GSM world.
